Examine the system of equations -3x+y=4, -9x+5y=-1 what is the solution
2 answers:
Answer: x=-7/2 y=29/2
Steps:
Use the elimination method
Multiply -3x+y=4 by 5 to make the coefficient next to the y in both equations the same
5(-3x+y=4)
-15x+5y=20
Then, subtract to eliminate the y
-15x+5y=20
- -9x+5y=-1
= -6x=21
Divide both sides by -6 to isolate x
= x= -7/2
Next substitute -7/2 into x in one of the equations
-3(-7/2)+y=4
-21/2+y=4
Add 21/2 from both sides to isolate y
y=29/2
Answer:
sorry i know im late but here
Step-by-step explanation:
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3.2w/8 l=x w/5 l
X= 5• 3.2/8= 16/8=2 centimeters
Sum = 20(1-(1/4)^5) / (1-1/4) = 26.64
